Finding the Fourth Proportional to 8,809.61, 12,157.82 and 5,820.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,809.61 : 12,157.82 = 5,820.20 : x
2. Step 2: Convert to fraction form
   8,809.61/12,157.82 = 5,820.20/x
3. Step 3: Cross multiply
   8,809.61x = 12,157.82 × 5,820.20
4. Step 4: Simplify right side
   8,809.61x = 70,760,854.07
5. Step 5: Solve for x
   x = 70,760,854.07/8,809.61
6. Step 6: Final answer
   x = 8,032.24